Well-screen



M; McLEAN.

WELL SCREEN.

APPLICATION FILED MAR. I, I920.

Patented Feb. 1, 1921.

Marrs M Leanj To all whom it may concern:

UNITED, STATES PATENT (SFFICEQ mums McLEAN, or 'nmumon'r, TEXAS.

WELL-SCREEN.

,Application filed March 1,

Be it known that I, Manes MoLEAN, a

' citizen ofthe United States, residing at Beaumont, in the county of J efli'erson and State of Texas, have invented certain new and spaced from the material of finer mesh whereby the outer, coarser screen restrainethe sand, shale or like materlal of large dimensions with a finer screenwith-m the outer screen for restraining sand or like inaterial of smaller dimensions.

Another object of the invention is to provide a screen in nature of a double screen built on or over any type of screen made on. pipe'section by re-wrapping about first screen a coarser mesh wire and spacing same from the first or inner screen by supporting bars, the coarser outside screen restrains shales and mucky materials of larger dimensions, which would muck the first or inside screen of any type, while the first or inner screen restrains sands and like materials of smaller dimensions.

Another object of the invention is to provide furrows in pipe section 'within which to place or fuse supportinglongitudinal or circumferential bars over which wire is wrapped, the furrow preventing any. slipping of the bars, any slipping of which would serve to throw the wire mesh but of gage, or cause them to be easily displaced.

' Another object of the invention is to rovide a screen on a pipe section divided into compartments by circumferential 'loars' at spaced intervals, so .that if the wire on one I section of screen is displaced and sand or other material fill the compartment where.

Specification of Letters Patent.

Patented Feb. '1, 1921 1920. Serial No. 362,384.

combinations as will be hereinafter more fully described and claimed.

In the drawings,

Figure l, is a view of the strainer in side elevation, certain parts being broken away, the particular type of screen there shown being the button screen. i

Fig. 2, is a'transverse sectional view taken on line 2-2 of Fig. 1.

F g. 3, is a transverse enlar ed, detail sectional view throu h one of t e buttons on the same plane as ig. 2. Fig. 4, is a view "of a slightly different type in SldBBlGVfi-tlOIl, parts being broken away.

Fig. 5, is'a transverse sectional view taken on line 5-5 of Fig. 4. I

Like characters of reference indicate corresponding parts throughout the several vlews.

The mproved well strainer which forms the sub ect matter of this application is of the type in general use which comprises a pipe 1( threaded as at 11, for a coupling. hls plpe may be of any length desired, the lower section being broken off to-indicate such indefinite and indeterminate length.

j a The pipe section '10, is provided with a plurality of perforations which may be cylindrical as indicated at 12, at Fig.5, or may be tapered as indicated at 13, at Figs. 2 and3. The tapered openings areused in conjunction with the button type' of strainers indicated at 14. .The' button strainer unit 14, having tapered side walls complementary to the tapered walls of the perforas tion 13, forms an improved type button strainer wherebythe button is capable of standing a greater external 'ressure than the ordinary button unit whic is seated ina cylindrical opening bearing upon a shoulder having its opening smaller in diameter than I y the opening which receives the button.

'. The present invention is not limited to the button type ofstrainer but as that type is included in the invention it will be :first described.

Between the several rows of perforations 13, which receive the buttons 14, furrows are formed in the periphery of the pipe as indicated at 15, at Fig. 2. Within these longitudinal furrows are seated bars 16, preferably composed of solder or other easily fusible metal retained in the furrows by being inserted or fused therein. The enat Fig. 1

the 'bar 16, is composite in nature being built up first of the section 17, as indicate Over this partially completed bar the outer screen is applied. As shown in the drawings this outer screen is of the wound wire type. It is to be understood that while the wound wire type of screen is at present considered the desirable screen for the purpose the invention is not limited to that type of screen. The screen is placed upon the bar sections 17, by winding thereon in the usual manner. After winding upon the bar 17 the screen so wound is secured by solder whereby the bar 16, is completed by fusing into the interstices of the screen other metal 18. The sections 17 and .18, forming anintegral or homogeneous structure, complete the entire bar 16, having the wires 19, of the outer screen fused therein. The bars 16 hold the screen composed of the wires 19, not only against dis placement relative to the pipe 10, but also I spaced away fromthe pipe 10, and the buttons l4.

Circumstantial ,bars .20 are also preferably employed at spaced intervals along the pipe 10, producing between the bars 20, and the bars 16, compartments. These bars being completed by fusing solder into the intervals between the wires19. These compartments are important to the present invention in that should the outer screen become fractured or the wire displaced, entering sand or the like will fill one single compartment the other compartments remain- .ing useful even though one compartment may be filled beyond utility.

In the type of screen shown at Fig. 4:, the bars 21, corresponding to the bars 16, are triple instead of double in nature. A. seetion is first introduced into the furrows of the pipe 10', and a fabric or wire wrapped screen 22, wound thereon. This fabric or wire wrapped screen is secured to the first layer of the bars 21, by soldering and other bar sections 23, are then secured upon the.

exterior. of the fabric or wire wrapped screen 22. The outer screen is then wound on and consists of the Wires 19, or of any approved type of external screen. The interstices of this outer screen are filled the .same as described in Figs. 1, 2 and 3, forming a' continuous homogeneous composite rib 2l, from the. bottom of the furrows to the external periphery of thei external screen. The circumferential ribs 20, are employed'in this type of screen the same as 'ingthe type 'of screen previously described and for the same purpose.

It willbe noted .especially from Fig. 5, that the composite bars 21, space the fabric or wire wrapped screen 22, away from the pipe 10, and the outer screen composed of the wires 19, away from the screen 22, wherebythe greatest amount of utility is provided in both of such screens. As indicated at Fig. 4, the inner screen 22, is intended to be of fine mesh and the outer screen of coarser mesh for the purpose hereinbefore disclosed.

In usethe screen constructed as hereinbefore described is employed in the usual well-known manner of using well screens.

I claim,

1. A well screen comprising a pipe section having perforations therethrough, bars extending longitudinally of the pipe and rigidly secured thereto, screen material interposed between the bars and other screen material secured to the outer peripheral surface of the bars and spaced from the periphery of the pipe and from the first mentioned screen material.

2. A well screen comprising a pipe section having perforations therethrough, bars extending longitudinally of the pipe and fused thereto, screen material covering the perforations and disposed between the bars and other screen material fused to the outer peripheral surfaces of the bars and spaced from the pipe and from the first mentioned screen material.

3. A well screen comprising a section of pipe having perforations therethrough and \furrows extending longitudinally thereof, screen units seated in the perforations, bars seated and fused in the furrows and screen material carried upon and fused to the peripheral surfaces of the bars and spaced from the pipe and the screen units.

4. A well screen comprising a pipe, ribs extending longitudinally of the pipe and supporting screen material spaced from the pipe and circumferential ribs extending between the longitudinal ribs and forming with the longitudinal ribs and the screen, compartments between said screen and the pipe.

5. A well screen comprising a pipe having perforations, an outer screen concentric with the pipe and spaced therefrom and longitudinal and circumferential ribs interposed between the screen and the pipe and forming compartments.

In witness whereof, I have hereunto set my hand and 35631 at Lake Charles, Calcasieu parish, Louisiana, this 18th day of February, A. D nineteen hundred and twenty.

MARRS McLEAN. [a 8. 

